Pressure-regulator.



L. w. CUSHMAN. PRESSURE REGULATOR.

APPLICATION FILED JUNE 19. 1917.

1,257,460. Patented Feb. 26,1918.

6 127's or um from 5120 01, in )1 /a r s 5 are side pump 1'5 a/r fun/i nd 5,01'0) Amzz/es 4 .Ta Zfan/i LUCIAN' W. GUSHMAN, 0! ST. JOSEPH, MISSOURI.

PRESSURE-REGULATOR.

Specification of Letters Patent.

Patented Feb. 26, 1918.

' Application filed June 19, 1917. Serial No. 175,665.

To all whom it may concern:

Be it known that I, LUCIAN W. CpsnMAN, a citizen of the United States, res1d1ng at St. Joseph, in the county of Buchanan and State of Missouri, have inventeda new and useful Pressure-Regulator, of which the following is a specification.

The present inventlon appertams to pressure regulators, and aims to provlde a novel and improved pressure regulator adapted especially for use in spraying equipments, such as used for spraying chemlcals on fruit trees, and the like, and being operable for relieving excess pressure when the dlscharge of the solution is checked, such as when all of the spray nozzles are not in use, the flow through some of them being shut ofi' momentarily.

It is the object of the invention to iI'OVldQ a pressure regulator having passages't rough which the liquid flows to and from the pressure pump, one passage or chamber being for the flow of llquid from the tank to the low pressure side of the pump and the other assage or chamber being for the flow of the lquid from the high pressure side of the v pump to the air tank and nozzles, in connectlon with novel means for shuntingthe liquid from the high pressure passage 1nto the low pressure passage in the event of exv cessive pressure, whereby to relieve such excessive pressure, and thereby relieve the work of the engine which drives the pump.

Another object of the invention is the provision of a removable stralner, and novel means for removably mounting 1t 1n the regulator, whereby the strainer can be readily removed to discharge the accummulations.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and 1n the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, can be made within the scope of what is claimed, without departing from the spirit of the inventlon.

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liquld and preventing The invention is illustrated in the accompanymg drawing, wherein igure 1 is a vertical median section of the regulator.

Fig. 21is a sectional detail on the line 2-2 The casting constituting the body of the regulator is provided at opposite sides with parallel vertlcal passages or chambers 1 and 2, and is provided at its lower end with an opening 3 between the lower ends of said passages across which a diaphragm 4 ex' tends, said diaphragm being clamped against the lower surface of the body around the openin 3 by means of a cap 5 bolted or otherwise astened to the body and providing a chamber therein below the diaphragm. The lower end of the passage 1 is provided with an outlet 6 for connectlon with the air tank and spray nozzles (not shown), while the cap 5 also ha an openin and connection 7 to communicate with the a1r tank, whereby the diaphragm 4 is subjected to the pressure of the liquid or solution which is forced from the passage 1. The upper end of the passage 1 has an inlet and connection 8 to communicate with the high pressure side of the force ump. The passage or chamber 2 is provi ed at its upper end with a lateral openlng 9 for connection with the liquid or solution tank, and said assage 2 is provided between its upper and lower ends with a lateral opening 10 for connection with the low pressure side of the pum It will therefore be obvious that the liquid will flow from the tank through the opening 9 into the passage or chamber 2, thence by way of the opening 10 to the pump, from which the liquid is forced through the opening 8 into the passage 1 and out the opening 6 to the air tank and spray nozzles.

A removable cleaner is provided within the passage or chamber 2 for straining the foreign matter going to the pump. For this reason, the lower end of the passage 2 is open, and a cap 11 bears upwardly against the body to cover the lower end of said passage. This cap 11 is provided with an upstanding boss 12 on .right cylindrical strainer 18, the. upper end of which is also open and abuts against an inwardl projecting annular flange 14 with which t e passage 2 is provided below the opening 9. The liquid which flows through the opening 9 into the assage 2 is constrained to flow downwar y into the strainer 13 and thence through the wall of the strainer to the opening 10,- whereby the foreign particle will be caught within the strainer. The cap 11 is tightly held in place by means of a bale 15 pivotally engaging op osite sides of the passage or chamber 2 an carrying at its intermediate ortion, a cam 16 to bear upwardly against t e cap 11 and force it tightly into closed position, the cam 16 having a handle or lever 17 -toswing upwardly against the cap 5 when the cam 16 is swung to locking position slightly beyond dead center. By swinging the handle 17 downwardly, this will release the cam 16, whereby the cam can be swung with the bale toward one side. The cap llrwill then drop, and permit the strainer to be dumped.

In order to shunt or transfer the liquid from the passage 1 back into the passage 2, in the event of excessive pressure, the body is provided with a horizontal passage or bypass 18 connecting the upper portions of the passages 1 and 2. There is a partition 19 between the upper end of the-passage 2 and the corresponding end of the passage 18, and said partition is provided with a nozzle 20 projecting across the passage 2 to the inlet opening 9 thereof, so as to project in the direction opposite to the flow of liquid into the passage 2 from the tank. The passage 18 is further provided between its ends with a partition 21 having an opening 22 and a recess 23 above said opening in which a removable valve seat 24 is fitted. A ball valve 25 is seatable downwardly against the seat 24 to shut ofi the flow of liquid through the pas sage 18 from the passage 1. The passage 18 is provided with a removable cap 26 above the valve 25 and having a depending guide 27 for said valve. This cap 26 when removed permits of the removal of the valve 25 and the removal or replacement of the valve seat 24.

As a means for unseatin the valve 25 when the pressure increases a ove normal, 9.

disk 29, bears against or seats upon the diaphragm 4: and has secured thereto the lower end of a push rod 28. The push rod is depressed to move the disk 29 and diaphragm 4 against pressure, by means of a coiled wire expansion spring 31 surrounding the push rod and seating at one end against an adjustable collar 30 upon the push rod, while the other end of the spring seats against a U- shaped guide 32 rigidly suspended from the menace passage 18. The push rod 28 is slidable through a gland 33, to prevent leakage, and projects into the passage 18 below the valve 25.

In operation, when the full amount of liquid is being discharged from the spray nozzle, the liquid will all flow through the passage 1, the valve 25 remaining seated by the pressure against it from the high pressure passage 1. Should the pressure become excessive, this will raise the diaphragm 4 and push rod 28, and said ush rod in contacting with the valve 25 wi unseat it. This permits the excessive liquid to flow from the opening 8 into the passage 18 past the valve 25, and the liquid will be discharged from the passage 18 through the nozzle 20. The liquid which is forced from the nozzle 20 will flow through the opening 9 in a directank to the pump, thereby not only shunting the excessive liquid into the passage or conduit leading from the tank to the pump, but tending to reverse the flow from the pump to the tank, if only for an instant. This will relieve the excesslve pressure, as well as relieving the engine of abnormal strain.

Having thus described the invention, what is claimed as new is:--

1. A pressure regulator embodyin a pair of assages to communicate with t e high an low pressure sides of a pump, and pressure controlled means for directing'the fluid from the high pressure passage into the low pressure passage in a direction opposite to the flow of fluid in the low pressure passage.

2. A pressure regulator embodying a pairof passages to communicate with the opposite side of a pump, a shunt passage between said passages having a nozzle projecting into one of them in a direction opposite to the direction of flow therein, a valve closing the shunt passage, and means for opening the valve in the event of excessive pressure.

3. A pressure regulator having a low ressure and a high pressure passage, a s unt passage connecting said passages and having a nozzle projecting into the low pressure passage in a direction opposite to the flow of liquid therein, and means controlling the flow of liquid through the shunt passage.

4s. A pressure regulator having a low pressure passage with aninlet at one end and an outlet between its ends, a high pressure passage, a shunt passage between the low and high pressure passages having a nozzle projecting across the low pressure passage toward the inlet thereof, a strainer within the low pressure passage removable through the other end thereof, and pressure controlled means controlling the flow of liquid through the shunt passage to the nozzle.

5. A pressure regulator embodying a vertical low pressure passage provided with an against said cap and a portion of the interior inlet at its upper end and having its lower of the low pressure passage between the inlet end open, a high pressure passage, a shunt and outlet thereof.

passage between the high pressure passage In testimony that I claim the foregoing as 5 and the upper end of the low pressure pasny own, I have hereto affixed my signature 15 sage, the low pressure passage being provided 1n the presence of two witnesses.

with an outlet between its ends, a removable LUCIAN W.- CUSHMAN. cap for the lower end of the low pressure Witnesses: passage, and a tubular strainer within the DWIGHT B. MAPEs,

20 low pressure passage having its ends seating ELIZUR S. OAs'rLn. 

